LED backlit LCD TV

The first commercial LED backlit LCD TV was the Sony Qualia 005 introduced in 2004. This featured RGB LED arrays to offer a color gamut around twice that of a conventional CCFL LCD television the combined light output from red, green and blue LEDs produces a more pure white light than is possible with a single white light. RGB LED technology continues to be used on selected Sony BRAVIA LCD models, with the addition of 'local dimming' which enables excellent on-screen contrast through selectively turning off the LEDs behind dark parts of a picture frame. The variations of LED backlighting do offer different benefits. LED-backlit LCD TVs are considered a more sustainable choice, with a longer life and better energy efficiency than plasmas and conventional LCD TVs. Unlike CCFL backlights, LEDs also use no mercury in their manufacture. However, other elements such as gallium and arsenic are used in the manufacture of the LED emitters themselves, meaning there is some debate over whether they are a significantly better long term solution to the problem of TV disposal.